package com.itheima.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.common.BaseContext;
import com.itheima.common.CustomException;
import com.itheima.entity.*;
import com.itheima.mapper.OrderMapper;
import com.itheima.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * ClassName: OrderServiceImpl
 * Package: com.itheima.service.impl
 * Description:  订单业务代码   *****
 *
 * @Author: @Albert
 * @Version: 1.0
 */

@Service
public class OrderServiceImpl extends ServiceImpl<OrderMapper, Orders> implements OrderService {
    @Autowired
    private ShoppingCartService cartService;
    @Autowired
    UserService userService;
    @Autowired
    AddressService addressService;
    @Autowired
    OrderDetailService detailService;
    @Override
    public void submit(Orders orders) {
        //获得当前用户ID
        Long userId = BaseContext.getCurrentId();
        //查询当前用户的购物车
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> carts = cartService.list(wrapper);
        if(carts==null || carts.size()==0){
            throw new CustomException("购物车不存在不能下单");
        }
        User user = userService.getById(userId);
        //查询地址参数
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressService.getById(addressBookId);
        //向订单表插入数据
        if(addressBook==null){
            throw new CustomException("购物车为空,不能下单");
        }
        long id = IdWorker.getId();
        AtomicInteger amount = new AtomicInteger(0); //原子操作
        List<OrderDetail> orderDetails = carts.stream().map((item)->{
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(id);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //向订单表中插入数据,一条数据
        orders.setId(id);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));
        orders.setUserId(userId);
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
            + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                +(addressBook.getDistrictName() == null ?"" : addressBook.getDistrictName())
        +(addressBook.getDetail()==null ? "" : addressBook.getDetail()));
        //向订单明细表插入数据
        this.save(orders);
        //清空购物车
        cartService.remove(wrapper);
    }
}
